Force grayscale (black and white) for a more appealing look to your users.

Easily toggable through the breadcrumb, making it easy to use.

Zero Queries, all done through client-side processing.

The options available are as follows:

All of this is done through a stylesheet that you can modify accordingly with basic CSS knowledge, since it was designed for the default XenForo theme (should work on other themes that aren't heavily modified).
If you need any help with custom themes just ask in the resource discussion and I'll help out